September weather forecast
Jayuya, PR

Shifting into autumnal gear, September poses a slightly cooler yet still quite balmy transition phase in Jayuya's seasonal cycle. During this month, the town experiences the highest rainfall of the year, dousing the land with around 4.45in of precipitation. The temperatures take a subtle dip, with the daily high averaging at around 85.8°F (29.9°C). Regardless of the increase in rainfall, the sun loyally dispenses an average of 9.2 hours of sunshine within the 12.2 daylight hours. The steadily blowing winds, averaging at approximately 6mph (9.7km/h), drive away the heat, leaving a more agreeable atmosphere in their wake.

Temperature

Jayuya records an average high-temperature of a moderately hot 85.8°F (29.9°C) in September, closely mirroring the climate of the previous month. An average nighttime temperature of 75.7°F (24.3°C) is noted during the month of September.

Heat index

The average heat index in September is estimated at a sweltering 98.6°F (37°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The average relative humidity in September is 80%.

Rainfall

September is the month with the most rainfall. Rain falls for 22.7 days and accumulates 4.45" (113mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of September, sunrise is at 6:12 am and sunset at 6:40 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 6:15 pm AST.

Sunshine

In September, the average sunshine is 9.2h.

UV index

The months with the highest UV index are May through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: In September, the UV index of 7 transforms into the following advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. To cut down UV radiation exposure by about half, sport a wide-brim hat.